PXD20RM Datasheet, PDF (74/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

• Program Trace via Branch Trace Messaging (BTM). Branch trace messaging displays program
flow discontinuities (direct and indirect branches, exceptions, etc.), allowing the development tool
to interpolate what transpires between the discontinuities. Thus static code may be traced.
• Data Trace via Data Write Messaging (DWM) and Data Read Messaging (DRM). This provides
the capability for the development tool to trace reads and/or writes to selected internal memory
resources.
• Ownership Trace via Ownership Trace Messaging (OTM). OTM facilitates ownership trace by
providing visibility of which process ID or operating system task is activated. An Ownership Trace
Message is transmitted when a new process/task is activated, allowing the development tool to
trace ownership flow.
• Run-time access to embedded processor memory map via the JTAG port. This allows for enhanced
download/upload capabilities.
• Watchpoint Messaging via the auxiliary pins
• Watchpoint Trigger enable of Program and/or Data Trace Messaging
• Data Acquisition Messaging (DQM) allows code to be instrumented to export customized
information to the Nexus Auxiliary Output Port.
• Address Translation Messaging via program correlation messages displays updates to the TLB for
use by the debugger in correlating virtual and physical address information
• Auxiliary interface for higher data input/output
• Registers for Program Trace, Data Trace, Ownership Trace and Watchpoint Trigger.
• All features controllable and configurable via the JTAG port
1.6 How to use the PXD20 documents
This section:
• Describes how the PXD20 documents provide information on the microcontroller
• Makes recommendations on how to use the documents in a system design
1.6.1 The PXD20 document set
The PXD20 document set comprises:
• This reference manual (provides information on the features of the logical blocks on the device and
how they are integrated with each other)
• The device data sheet (specifies the electrical characteristics of the device)
• The device product brief
The following reference documents (available online at www.freescale.com) are also available to support
the CPU on this device:
• Programmer’s Reference Manual for Freescale Embedded Processors
• e200z4 Power Architecture Core Reference Manual
• Variable-Length Encoding (VLE) Programming Environments Manual
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PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor